Acoustical transformer for coupling sound waves from the diaphragm to the throat of a horn-type loudspeaker



FIG. 1 is a top plan view of the accoustical transformer for coupling sound waves from the diaphragm to the throat of a horn-type loudspeaker showing my new design;

FIG. 2 is a bottom plan view thereof;

FIG. 3 is a side elevational view thereof;

FIG. 4 is a side elevational perspective view thereof; and

FIG. 5 is a side elevational perspective view thereof taken from the side opposite to that shown in FIG. 4. 

The ornamental design for a accoustical transformer for coupling sound waves from the diaphragm to the throat of a horn-type loudspeaker, as shown. 